We don't have synonyms for balkanise yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are balkans, balkanize and balkanite.
(v) :
Non-Oxford British English standard spelling of Balkanize. [(transitive) To break up into small, mutually-hostile units, especially on a political basis.]
(v) :
Non-Oxford British English standard spelling of Balkanize. [(transitive) To break up into small, mutually-hostile units, especially on a political basis.]